Logitech

ltunify

• list: list paired devices

[schwarzgerat](0) $ ltunify list
Devices count: 1
Connected devices:
idx=1	Mouse	MX Master 3000
[schwarzgerat](0) $

• info: info on paired device

[schwarzgerat](1) $ ltunify info 1
HID++ version: 4.5
Device index 1
Mouse
Name: MX Master 3000
Wireless Product ID: 4082
Serial number: 01E39572
Device was unavailable, version information not available.
[schwarzgerat](0) $ 

• receiver-info: info on receiver

[schwarzgerat](1) $ ltunify receiver-info
Serial number: FB43943A
Firmware version: 012.011.00032
Bootloader version: BL.004.016
[schwarzgerat](0) $ 

Supposedly fwupd can update receiver firmware:

├─Unifying Receiver:
│     Device ID:          2044aeb9e83ac548716e67aa63f1999d918f1886
│     Summary:            Miniaturised USB wireless receiver
│     Current version:    RQR12.11_B0032
│     Bootloader Version: BOT01.04_B0016
│     Vendor:             HIDRAW:0x046D|USB:0x046D
│     Install Duration:   30 seconds
│     GUIDs:              9d131a0c-a606-580f-8eda-80587250b8d6
│                         279ed287-3607-549e-bacc-f873bb9838c4 ← HIDRAW\VEN_046D&DEV_C52B
│                         fcf55bf5-767b-51ce-9c17-f6f538c4ee9f ← HIDRAW\VEN_046D&DEV_C52B&REV_00
│     Device Flags:       • Updatable
│                         • Signed Payload